public void sort(double[] a, int b)
        {
            for (double i = 1.0; i < Convert.ToDouble(b - 1); i++)
            {
                double k = i;
                for (double j = i + 1; j < Convert.ToDouble(b); j++)
                {
                    if (a[j] > a[k])
                    { k = j; }
                }
                if (k != i)
                {
                    double t = 0;
                    t = a[i];
                    a[i] = a[k];
                    a[k] = t;
                }
            }

        }
请问这个排序方法错在哪里，系统总是多处报错“无法将类型double隐式转换为int,存在一个显示转换”，请解释详细点，3q!